Calculation for the selection of wall thickness and span of large-diameter, thin-walled, atmospheric-pressure pipelines
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How are the wall thickness and span of large-diameter, thin-walled, atmospheric-pressure pipes calculated? There is a pipeline for conveying flue gas, a positive-pressure pipeline with a pressure of 3000 Pa and a diameter of φ7200 mm. How do I calculate the wall thickness (without considering corrosion allowance) and the span? If the span is calculated solely based on the stiffness and strength of the pipeline, the resulting values are extremely large. Pipes of such a large diameter should require the installation of reinforcement rings, but generally, reinforcement rings are calculated for pipes under negative pressure or those under high pressure; this situation is different, so the calculation methods for reinforcement rings specified in GB150 for pressure vessels cannot be applied. I welcome advice from all experts.
The wall thickness of flue gas pipelines and the spacing of longitudinal reinforcement ribs can refer to the \"Technical Specifications for the Design of Flue Gas, Air, and Coal Powder Pipelines in Thermal Power Plants\" (DL T5121-2000)
Local reinforcement at the support location must be considered; otherwise local deformation is likely to occur. It’s similar to smoke and air ducts – generally, a large span is required when the strength and stiffness of the cylinder are taken into account
The original poster is asking about the spacing between supports and hangers, not the spacing between reinforcement ribs